Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1 | /* |
| 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
| 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
| 5 | Copyright (C) 2010 Google Inc. |
| 6 | |
| 7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License version 2 as |
| 11 | published by the Free Software Foundation; |
| 12 | |
| 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
| 17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 21 | |
| 22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
| 24 | SOFTWARE IS DISCLAIMED. |
| 25 | */ |
| 26 | |
| 27 | /* Bluetooth L2CAP sockets. */ |
| 28 | |
| 29 | #include <net/bluetooth/bluetooth.h> |
Gustavo F. Padovan | 33575df | 2011-02-04 02:48:48 -0200 | [diff] [blame] | 30 | #include <net/bluetooth/hci_core.h> |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 31 | #include <net/bluetooth/l2cap.h> |
| 32 | |
Gustavo F. Padovan | 6ddc048 | 2011-02-04 03:23:31 -0200 | [diff] [blame] | 33 | /* ---- L2CAP timers ---- */ |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 34 | static void l2cap_sock_timeout(unsigned long arg) |
| 35 | { |
| 36 | struct sock *sk = (struct sock *) arg; |
| 37 | int reason; |
| 38 | |
| 39 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 40 | |
| 41 | bh_lock_sock(sk); |
| 42 | |
| 43 | if (sock_owned_by_user(sk)) { |
| 44 | /* sk is owned by user. Try again later */ |
| 45 | l2cap_sock_set_timer(sk, HZ / 5); |
| 46 | bh_unlock_sock(sk); |
| 47 | sock_put(sk); |
| 48 | return; |
| 49 | } |
| 50 | |
| 51 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
| 52 | reason = ECONNREFUSED; |
| 53 | else if (sk->sk_state == BT_CONNECT && |
| 54 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
| 55 | reason = ECONNREFUSED; |
| 56 | else |
| 57 | reason = ETIMEDOUT; |
| 58 | |
| 59 | __l2cap_sock_close(sk, reason); |
| 60 | |
| 61 | bh_unlock_sock(sk); |
| 62 | |
| 63 | l2cap_sock_kill(sk); |
| 64 | sock_put(sk); |
| 65 | } |
| 66 | |
Gustavo F. Padovan | 6ddc048 | 2011-02-04 03:23:31 -0200 | [diff] [blame] | 67 | void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 68 | { |
| 69 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 70 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 71 | } |
| 72 | |
| 73 | void l2cap_sock_clear_timer(struct sock *sk) |
| 74 | { |
| 75 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 76 | sk_stop_timer(sk, &sk->sk_timer); |
| 77 | } |
| 78 | |
Gustavo F. Padovan | af6bcd8 | 2011-02-04 02:40:28 -0200 | [diff] [blame] | 79 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
| 80 | { |
| 81 | struct sock *sk; |
| 82 | struct hlist_node *node; |
| 83 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 84 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 85 | goto found; |
| 86 | sk = NULL; |
| 87 | found: |
| 88 | return sk; |
| 89 | } |
| 90 | |
| 91 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
| 92 | { |
| 93 | struct sock *sk = sock->sk; |
| 94 | struct sockaddr_l2 la; |
| 95 | int len, err = 0; |
| 96 | |
| 97 | BT_DBG("sk %p", sk); |
| 98 | |
| 99 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 100 | return -EINVAL; |
| 101 | |
| 102 | memset(&la, 0, sizeof(la)); |
| 103 | len = min_t(unsigned int, sizeof(la), alen); |
| 104 | memcpy(&la, addr, len); |
| 105 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 106 | if (la.l2_cid && la.l2_psm) |
Gustavo F. Padovan | af6bcd8 | 2011-02-04 02:40:28 -0200 | [diff] [blame] | 107 | return -EINVAL; |
| 108 | |
| 109 | lock_sock(sk); |
| 110 | |
| 111 | if (sk->sk_state != BT_OPEN) { |
| 112 | err = -EBADFD; |
| 113 | goto done; |
| 114 | } |
| 115 | |
| 116 | if (la.l2_psm) { |
| 117 | __u16 psm = __le16_to_cpu(la.l2_psm); |
| 118 | |
| 119 | /* PSM must be odd and lsb of upper byte must be 0 */ |
| 120 | if ((psm & 0x0101) != 0x0001) { |
| 121 | err = -EINVAL; |
| 122 | goto done; |
| 123 | } |
| 124 | |
| 125 | /* Restrict usage of well-known PSMs */ |
| 126 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { |
| 127 | err = -EACCES; |
| 128 | goto done; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | write_lock_bh(&l2cap_sk_list.lock); |
| 133 | |
| 134 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
| 135 | err = -EADDRINUSE; |
| 136 | } else { |
| 137 | /* Save source address */ |
| 138 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
| 139 | l2cap_pi(sk)->psm = la.l2_psm; |
| 140 | l2cap_pi(sk)->sport = la.l2_psm; |
| 141 | sk->sk_state = BT_BOUND; |
| 142 | |
| 143 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
| 144 | __le16_to_cpu(la.l2_psm) == 0x0003) |
| 145 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
| 146 | } |
| 147 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 148 | if (la.l2_cid) |
| 149 | l2cap_pi(sk)->scid = la.l2_cid; |
| 150 | |
Gustavo F. Padovan | af6bcd8 | 2011-02-04 02:40:28 -0200 | [diff] [blame] | 151 | write_unlock_bh(&l2cap_sk_list.lock); |
| 152 | |
| 153 | done: |
| 154 | release_sock(sk); |
| 155 | return err; |
| 156 | } |
| 157 | |
Gustavo F. Padovan | 4e34c50 | 2011-02-04 02:56:13 -0200 | [diff] [blame] | 158 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 159 | { |
| 160 | struct sock *sk = sock->sk; |
| 161 | struct sockaddr_l2 la; |
| 162 | int len, err = 0; |
| 163 | |
| 164 | BT_DBG("sk %p", sk); |
| 165 | |
| 166 | if (!addr || alen < sizeof(addr->sa_family) || |
| 167 | addr->sa_family != AF_BLUETOOTH) |
| 168 | return -EINVAL; |
| 169 | |
| 170 | memset(&la, 0, sizeof(la)); |
| 171 | len = min_t(unsigned int, sizeof(la), alen); |
| 172 | memcpy(&la, addr, len); |
| 173 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 174 | if (la.l2_cid && la.l2_psm) |
Gustavo F. Padovan | 4e34c50 | 2011-02-04 02:56:13 -0200 | [diff] [blame] | 175 | return -EINVAL; |
| 176 | |
| 177 | lock_sock(sk); |
| 178 | |
| 179 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 180 | && !(la.l2_psm || la.l2_cid)) { |
Gustavo F. Padovan | 4e34c50 | 2011-02-04 02:56:13 -0200 | [diff] [blame] | 181 | err = -EINVAL; |
| 182 | goto done; |
| 183 | } |
| 184 | |
| 185 | switch (l2cap_pi(sk)->mode) { |
| 186 | case L2CAP_MODE_BASIC: |
| 187 | break; |
| 188 | case L2CAP_MODE_ERTM: |
| 189 | case L2CAP_MODE_STREAMING: |
| 190 | if (!disable_ertm) |
| 191 | break; |
| 192 | /* fall through */ |
| 193 | default: |
| 194 | err = -ENOTSUPP; |
| 195 | goto done; |
| 196 | } |
| 197 | |
| 198 | switch (sk->sk_state) { |
| 199 | case BT_CONNECT: |
| 200 | case BT_CONNECT2: |
| 201 | case BT_CONFIG: |
| 202 | /* Already connecting */ |
| 203 | goto wait; |
| 204 | |
| 205 | case BT_CONNECTED: |
| 206 | /* Already connected */ |
| 207 | err = -EISCONN; |
| 208 | goto done; |
| 209 | |
| 210 | case BT_OPEN: |
| 211 | case BT_BOUND: |
| 212 | /* Can connect */ |
| 213 | break; |
| 214 | |
| 215 | default: |
| 216 | err = -EBADFD; |
| 217 | goto done; |
| 218 | } |
| 219 | |
| 220 | /* PSM must be odd and lsb of upper byte must be 0 */ |
| 221 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 222 | sk->sk_type != SOCK_RAW && !la.l2_cid) { |
Gustavo F. Padovan | 4e34c50 | 2011-02-04 02:56:13 -0200 | [diff] [blame] | 223 | err = -EINVAL; |
| 224 | goto done; |
| 225 | } |
| 226 | |
| 227 | /* Set destination address and psm */ |
| 228 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
| 229 | l2cap_pi(sk)->psm = la.l2_psm; |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 230 | l2cap_pi(sk)->dcid = la.l2_cid; |
Gustavo F. Padovan | 4e34c50 | 2011-02-04 02:56:13 -0200 | [diff] [blame] | 231 | |
| 232 | err = l2cap_do_connect(sk); |
| 233 | if (err) |
| 234 | goto done; |
| 235 | |
| 236 | wait: |
| 237 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 238 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 239 | done: |
| 240 | release_sock(sk); |
| 241 | return err; |
| 242 | } |
| 243 | |
Gustavo F. Padovan | af6bcd8 | 2011-02-04 02:40:28 -0200 | [diff] [blame] | 244 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 245 | { |
| 246 | struct sock *sk = sock->sk; |
| 247 | int err = 0; |
| 248 | |
| 249 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 250 | |
| 251 | lock_sock(sk); |
| 252 | |
| 253 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
| 254 | || sk->sk_state != BT_BOUND) { |
| 255 | err = -EBADFD; |
| 256 | goto done; |
| 257 | } |
| 258 | |
| 259 | switch (l2cap_pi(sk)->mode) { |
| 260 | case L2CAP_MODE_BASIC: |
| 261 | break; |
| 262 | case L2CAP_MODE_ERTM: |
| 263 | case L2CAP_MODE_STREAMING: |
| 264 | if (!disable_ertm) |
| 265 | break; |
| 266 | /* fall through */ |
| 267 | default: |
| 268 | err = -ENOTSUPP; |
| 269 | goto done; |
| 270 | } |
| 271 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 272 | if (!l2cap_pi(sk)->psm && !l2cap_pi(sk)->dcid) { |
Gustavo F. Padovan | af6bcd8 | 2011-02-04 02:40:28 -0200 | [diff] [blame] | 273 | bdaddr_t *src = &bt_sk(sk)->src; |
| 274 | u16 psm; |
| 275 | |
| 276 | err = -EINVAL; |
| 277 | |
| 278 | write_lock_bh(&l2cap_sk_list.lock); |
| 279 | |
| 280 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
| 281 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
| 282 | l2cap_pi(sk)->psm = cpu_to_le16(psm); |
| 283 | l2cap_pi(sk)->sport = cpu_to_le16(psm); |
| 284 | err = 0; |
| 285 | break; |
| 286 | } |
| 287 | |
| 288 | write_unlock_bh(&l2cap_sk_list.lock); |
| 289 | |
| 290 | if (err < 0) |
| 291 | goto done; |
| 292 | } |
| 293 | |
| 294 | sk->sk_max_ack_backlog = backlog; |
| 295 | sk->sk_ack_backlog = 0; |
| 296 | sk->sk_state = BT_LISTEN; |
| 297 | |
| 298 | done: |
| 299 | release_sock(sk); |
| 300 | return err; |
| 301 | } |
| 302 | |
Gustavo F. Padovan | c47b7c7 | 2011-02-04 02:42:23 -0200 | [diff] [blame] | 303 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 304 | { |
| 305 | DECLARE_WAITQUEUE(wait, current); |
| 306 | struct sock *sk = sock->sk, *nsk; |
| 307 | long timeo; |
| 308 | int err = 0; |
| 309 | |
| 310 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
| 311 | |
| 312 | if (sk->sk_state != BT_LISTEN) { |
| 313 | err = -EBADFD; |
| 314 | goto done; |
| 315 | } |
| 316 | |
| 317 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 318 | |
| 319 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 320 | |
| 321 | /* Wait for an incoming connection. (wake-one). */ |
| 322 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
| 323 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 324 | set_current_state(TASK_INTERRUPTIBLE); |
| 325 | if (!timeo) { |
| 326 | err = -EAGAIN; |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | release_sock(sk); |
| 331 | timeo = schedule_timeout(timeo); |
| 332 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
| 333 | |
| 334 | if (sk->sk_state != BT_LISTEN) { |
| 335 | err = -EBADFD; |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | if (signal_pending(current)) { |
| 340 | err = sock_intr_errno(timeo); |
| 341 | break; |
| 342 | } |
| 343 | } |
| 344 | set_current_state(TASK_RUNNING); |
| 345 | remove_wait_queue(sk_sleep(sk), &wait); |
| 346 | |
| 347 | if (err) |
| 348 | goto done; |
| 349 | |
| 350 | newsock->state = SS_CONNECTED; |
| 351 | |
| 352 | BT_DBG("new socket %p", nsk); |
| 353 | |
| 354 | done: |
| 355 | release_sock(sk); |
| 356 | return err; |
| 357 | } |
| 358 | |
Gustavo F. Padovan | d7175d5 | 2011-02-04 02:43:46 -0200 | [diff] [blame] | 359 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 360 | { |
| 361 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 362 | struct sock *sk = sock->sk; |
| 363 | |
| 364 | BT_DBG("sock %p, sk %p", sock, sk); |
| 365 | |
| 366 | addr->sa_family = AF_BLUETOOTH; |
| 367 | *len = sizeof(struct sockaddr_l2); |
| 368 | |
| 369 | if (peer) { |
| 370 | la->l2_psm = l2cap_pi(sk)->psm; |
| 371 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
| 372 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 373 | } else { |
| 374 | la->l2_psm = l2cap_pi(sk)->sport; |
| 375 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
| 376 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 377 | } |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
Gustavo F. Padovan | 99f4808 | 2011-02-04 02:52:55 -0200 | [diff] [blame] | 382 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
| 383 | { |
| 384 | struct sock *sk = sock->sk; |
| 385 | struct l2cap_options opts; |
| 386 | struct l2cap_conninfo cinfo; |
| 387 | int len, err = 0; |
| 388 | u32 opt; |
| 389 | |
| 390 | BT_DBG("sk %p", sk); |
| 391 | |
| 392 | if (get_user(len, optlen)) |
| 393 | return -EFAULT; |
| 394 | |
| 395 | lock_sock(sk); |
| 396 | |
| 397 | switch (optname) { |
| 398 | case L2CAP_OPTIONS: |
Vasiliy Kulikov | e3fb592 | 2011-02-10 20:59:42 +0300 | [diff] [blame] | 399 | memset(&opts, 0, sizeof(opts)); |
Gustavo F. Padovan | 99f4808 | 2011-02-04 02:52:55 -0200 | [diff] [blame] | 400 | opts.imtu = l2cap_pi(sk)->imtu; |
| 401 | opts.omtu = l2cap_pi(sk)->omtu; |
| 402 | opts.flush_to = l2cap_pi(sk)->flush_to; |
| 403 | opts.mode = l2cap_pi(sk)->mode; |
| 404 | opts.fcs = l2cap_pi(sk)->fcs; |
| 405 | opts.max_tx = l2cap_pi(sk)->max_tx; |
| 406 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
| 407 | |
| 408 | len = min_t(unsigned int, len, sizeof(opts)); |
| 409 | if (copy_to_user(optval, (char *) &opts, len)) |
| 410 | err = -EFAULT; |
| 411 | |
| 412 | break; |
| 413 | |
| 414 | case L2CAP_LM: |
| 415 | switch (l2cap_pi(sk)->sec_level) { |
| 416 | case BT_SECURITY_LOW: |
| 417 | opt = L2CAP_LM_AUTH; |
| 418 | break; |
| 419 | case BT_SECURITY_MEDIUM: |
| 420 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; |
| 421 | break; |
| 422 | case BT_SECURITY_HIGH: |
| 423 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | |
| 424 | L2CAP_LM_SECURE; |
| 425 | break; |
| 426 | default: |
| 427 | opt = 0; |
| 428 | break; |
| 429 | } |
| 430 | |
| 431 | if (l2cap_pi(sk)->role_switch) |
| 432 | opt |= L2CAP_LM_MASTER; |
| 433 | |
| 434 | if (l2cap_pi(sk)->force_reliable) |
| 435 | opt |= L2CAP_LM_RELIABLE; |
| 436 | |
| 437 | if (put_user(opt, (u32 __user *) optval)) |
| 438 | err = -EFAULT; |
| 439 | break; |
| 440 | |
| 441 | case L2CAP_CONNINFO: |
| 442 | if (sk->sk_state != BT_CONNECTED && |
| 443 | !(sk->sk_state == BT_CONNECT2 && |
| 444 | bt_sk(sk)->defer_setup)) { |
| 445 | err = -ENOTCONN; |
| 446 | break; |
| 447 | } |
| 448 | |
| 449 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 450 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 451 | |
| 452 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 453 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 454 | err = -EFAULT; |
| 455 | |
| 456 | break; |
| 457 | |
| 458 | default: |
| 459 | err = -ENOPROTOOPT; |
| 460 | break; |
| 461 | } |
| 462 | |
| 463 | release_sock(sk); |
| 464 | return err; |
| 465 | } |
| 466 | |
| 467 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 468 | { |
| 469 | struct sock *sk = sock->sk; |
| 470 | struct bt_security sec; |
| 471 | int len, err = 0; |
| 472 | |
| 473 | BT_DBG("sk %p", sk); |
| 474 | |
| 475 | if (level == SOL_L2CAP) |
| 476 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); |
| 477 | |
| 478 | if (level != SOL_BLUETOOTH) |
| 479 | return -ENOPROTOOPT; |
| 480 | |
| 481 | if (get_user(len, optlen)) |
| 482 | return -EFAULT; |
| 483 | |
| 484 | lock_sock(sk); |
| 485 | |
| 486 | switch (optname) { |
| 487 | case BT_SECURITY: |
| 488 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
| 489 | && sk->sk_type != SOCK_RAW) { |
| 490 | err = -EINVAL; |
| 491 | break; |
| 492 | } |
| 493 | |
| 494 | sec.level = l2cap_pi(sk)->sec_level; |
| 495 | |
| 496 | len = min_t(unsigned int, len, sizeof(sec)); |
| 497 | if (copy_to_user(optval, (char *) &sec, len)) |
| 498 | err = -EFAULT; |
| 499 | |
| 500 | break; |
| 501 | |
| 502 | case BT_DEFER_SETUP: |
| 503 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 504 | err = -EINVAL; |
| 505 | break; |
| 506 | } |
| 507 | |
| 508 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) |
| 509 | err = -EFAULT; |
| 510 | |
| 511 | break; |
| 512 | |
| 513 | case BT_FLUSHABLE: |
| 514 | if (put_user(l2cap_pi(sk)->flushable, (u32 __user *) optval)) |
| 515 | err = -EFAULT; |
| 516 | |
| 517 | break; |
| 518 | |
| 519 | default: |
| 520 | err = -ENOPROTOOPT; |
| 521 | break; |
| 522 | } |
| 523 | |
| 524 | release_sock(sk); |
| 525 | return err; |
| 526 | } |
| 527 | |
Gustavo F. Padovan | 33575df | 2011-02-04 02:48:48 -0200 | [diff] [blame] | 528 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
| 529 | { |
| 530 | struct sock *sk = sock->sk; |
| 531 | struct l2cap_options opts; |
| 532 | int len, err = 0; |
| 533 | u32 opt; |
| 534 | |
| 535 | BT_DBG("sk %p", sk); |
| 536 | |
| 537 | lock_sock(sk); |
| 538 | |
| 539 | switch (optname) { |
| 540 | case L2CAP_OPTIONS: |
| 541 | if (sk->sk_state == BT_CONNECTED) { |
| 542 | err = -EINVAL; |
| 543 | break; |
| 544 | } |
| 545 | |
| 546 | opts.imtu = l2cap_pi(sk)->imtu; |
| 547 | opts.omtu = l2cap_pi(sk)->omtu; |
| 548 | opts.flush_to = l2cap_pi(sk)->flush_to; |
| 549 | opts.mode = l2cap_pi(sk)->mode; |
| 550 | opts.fcs = l2cap_pi(sk)->fcs; |
| 551 | opts.max_tx = l2cap_pi(sk)->max_tx; |
| 552 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
| 553 | |
| 554 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 555 | if (copy_from_user((char *) &opts, optval, len)) { |
| 556 | err = -EFAULT; |
| 557 | break; |
| 558 | } |
| 559 | |
| 560 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { |
| 561 | err = -EINVAL; |
| 562 | break; |
| 563 | } |
| 564 | |
| 565 | l2cap_pi(sk)->mode = opts.mode; |
| 566 | switch (l2cap_pi(sk)->mode) { |
| 567 | case L2CAP_MODE_BASIC: |
| 568 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
| 569 | break; |
| 570 | case L2CAP_MODE_ERTM: |
| 571 | case L2CAP_MODE_STREAMING: |
| 572 | if (!disable_ertm) |
| 573 | break; |
| 574 | /* fall through */ |
| 575 | default: |
| 576 | err = -EINVAL; |
| 577 | break; |
| 578 | } |
| 579 | |
| 580 | l2cap_pi(sk)->imtu = opts.imtu; |
| 581 | l2cap_pi(sk)->omtu = opts.omtu; |
| 582 | l2cap_pi(sk)->fcs = opts.fcs; |
| 583 | l2cap_pi(sk)->max_tx = opts.max_tx; |
| 584 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
| 585 | break; |
| 586 | |
| 587 | case L2CAP_LM: |
| 588 | if (get_user(opt, (u32 __user *) optval)) { |
| 589 | err = -EFAULT; |
| 590 | break; |
| 591 | } |
| 592 | |
| 593 | if (opt & L2CAP_LM_AUTH) |
| 594 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; |
| 595 | if (opt & L2CAP_LM_ENCRYPT) |
| 596 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; |
| 597 | if (opt & L2CAP_LM_SECURE) |
| 598 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; |
| 599 | |
| 600 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); |
| 601 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); |
| 602 | break; |
| 603 | |
| 604 | default: |
| 605 | err = -ENOPROTOOPT; |
| 606 | break; |
| 607 | } |
| 608 | |
| 609 | release_sock(sk); |
| 610 | return err; |
| 611 | } |
| 612 | |
| 613 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
| 614 | { |
| 615 | struct sock *sk = sock->sk; |
| 616 | struct bt_security sec; |
| 617 | int len, err = 0; |
| 618 | u32 opt; |
| 619 | |
| 620 | BT_DBG("sk %p", sk); |
| 621 | |
| 622 | if (level == SOL_L2CAP) |
| 623 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); |
| 624 | |
| 625 | if (level != SOL_BLUETOOTH) |
| 626 | return -ENOPROTOOPT; |
| 627 | |
| 628 | lock_sock(sk); |
| 629 | |
| 630 | switch (optname) { |
| 631 | case BT_SECURITY: |
| 632 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
| 633 | && sk->sk_type != SOCK_RAW) { |
| 634 | err = -EINVAL; |
| 635 | break; |
| 636 | } |
| 637 | |
| 638 | sec.level = BT_SECURITY_LOW; |
| 639 | |
| 640 | len = min_t(unsigned int, sizeof(sec), optlen); |
| 641 | if (copy_from_user((char *) &sec, optval, len)) { |
| 642 | err = -EFAULT; |
| 643 | break; |
| 644 | } |
| 645 | |
| 646 | if (sec.level < BT_SECURITY_LOW || |
| 647 | sec.level > BT_SECURITY_HIGH) { |
| 648 | err = -EINVAL; |
| 649 | break; |
| 650 | } |
| 651 | |
| 652 | l2cap_pi(sk)->sec_level = sec.level; |
| 653 | break; |
| 654 | |
| 655 | case BT_DEFER_SETUP: |
| 656 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 657 | err = -EINVAL; |
| 658 | break; |
| 659 | } |
| 660 | |
| 661 | if (get_user(opt, (u32 __user *) optval)) { |
| 662 | err = -EFAULT; |
| 663 | break; |
| 664 | } |
| 665 | |
| 666 | bt_sk(sk)->defer_setup = opt; |
| 667 | break; |
| 668 | |
| 669 | case BT_FLUSHABLE: |
| 670 | if (get_user(opt, (u32 __user *) optval)) { |
| 671 | err = -EFAULT; |
| 672 | break; |
| 673 | } |
| 674 | |
| 675 | if (opt > BT_FLUSHABLE_ON) { |
| 676 | err = -EINVAL; |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | if (opt == BT_FLUSHABLE_OFF) { |
| 681 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 682 | /* proceed futher only when we have l2cap_conn and |
| 683 | No Flush support in the LM */ |
| 684 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { |
| 685 | err = -EINVAL; |
| 686 | break; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | l2cap_pi(sk)->flushable = opt; |
| 691 | break; |
| 692 | |
| 693 | default: |
| 694 | err = -ENOPROTOOPT; |
| 695 | break; |
| 696 | } |
| 697 | |
| 698 | release_sock(sk); |
| 699 | return err; |
| 700 | } |
| 701 | |
Gustavo F. Padovan | fd83ccd | 2011-02-04 03:20:52 -0200 | [diff] [blame] | 702 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 703 | { |
| 704 | struct sock *sk = sock->sk; |
| 705 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 706 | struct sk_buff *skb; |
| 707 | u16 control; |
| 708 | int err; |
| 709 | |
| 710 | BT_DBG("sock %p, sk %p", sock, sk); |
| 711 | |
| 712 | err = sock_error(sk); |
| 713 | if (err) |
| 714 | return err; |
| 715 | |
| 716 | if (msg->msg_flags & MSG_OOB) |
| 717 | return -EOPNOTSUPP; |
| 718 | |
| 719 | lock_sock(sk); |
| 720 | |
| 721 | if (sk->sk_state != BT_CONNECTED) { |
| 722 | err = -ENOTCONN; |
| 723 | goto done; |
| 724 | } |
| 725 | |
| 726 | /* Connectionless channel */ |
| 727 | if (sk->sk_type == SOCK_DGRAM) { |
| 728 | skb = l2cap_create_connless_pdu(sk, msg, len); |
| 729 | if (IS_ERR(skb)) { |
| 730 | err = PTR_ERR(skb); |
| 731 | } else { |
| 732 | l2cap_do_send(sk, skb); |
| 733 | err = len; |
| 734 | } |
| 735 | goto done; |
| 736 | } |
| 737 | |
| 738 | switch (pi->mode) { |
| 739 | case L2CAP_MODE_BASIC: |
| 740 | /* Check outgoing MTU */ |
| 741 | if (len > pi->omtu) { |
| 742 | err = -EMSGSIZE; |
| 743 | goto done; |
| 744 | } |
| 745 | |
| 746 | /* Create a basic PDU */ |
| 747 | skb = l2cap_create_basic_pdu(sk, msg, len); |
| 748 | if (IS_ERR(skb)) { |
| 749 | err = PTR_ERR(skb); |
| 750 | goto done; |
| 751 | } |
| 752 | |
| 753 | l2cap_do_send(sk, skb); |
| 754 | err = len; |
| 755 | break; |
| 756 | |
| 757 | case L2CAP_MODE_ERTM: |
| 758 | case L2CAP_MODE_STREAMING: |
| 759 | /* Entire SDU fits into one PDU */ |
| 760 | if (len <= pi->remote_mps) { |
| 761 | control = L2CAP_SDU_UNSEGMENTED; |
| 762 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
| 763 | if (IS_ERR(skb)) { |
| 764 | err = PTR_ERR(skb); |
| 765 | goto done; |
| 766 | } |
| 767 | __skb_queue_tail(TX_QUEUE(sk), skb); |
| 768 | |
| 769 | if (sk->sk_send_head == NULL) |
| 770 | sk->sk_send_head = skb; |
| 771 | |
| 772 | } else { |
| 773 | /* Segment SDU into multiples PDUs */ |
| 774 | err = l2cap_sar_segment_sdu(sk, msg, len); |
| 775 | if (err < 0) |
| 776 | goto done; |
| 777 | } |
| 778 | |
| 779 | if (pi->mode == L2CAP_MODE_STREAMING) { |
| 780 | l2cap_streaming_send(sk); |
| 781 | } else { |
| 782 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 783 | (pi->conn_state & L2CAP_CONN_WAIT_F)) { |
| 784 | err = len; |
| 785 | break; |
| 786 | } |
| 787 | err = l2cap_ertm_send(sk); |
| 788 | } |
| 789 | |
| 790 | if (err >= 0) |
| 791 | err = len; |
| 792 | break; |
| 793 | |
| 794 | default: |
| 795 | BT_DBG("bad state %1.1x", pi->mode); |
| 796 | err = -EBADFD; |
| 797 | } |
| 798 | |
| 799 | done: |
| 800 | release_sock(sk); |
| 801 | return err; |
| 802 | } |
| 803 | |
Gustavo F. Padovan | 6898325 | 2011-02-04 03:02:31 -0200 | [diff] [blame] | 804 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
| 805 | { |
| 806 | struct sock *sk = sock->sk; |
| 807 | |
| 808 | lock_sock(sk); |
| 809 | |
| 810 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
| 811 | struct l2cap_conn_rsp rsp; |
| 812 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 813 | u8 buf[128]; |
| 814 | |
| 815 | sk->sk_state = BT_CONFIG; |
| 816 | |
| 817 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 818 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 819 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 820 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 821 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, |
| 822 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 823 | |
| 824 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) { |
| 825 | release_sock(sk); |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 830 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 831 | l2cap_build_conf_req(sk, buf), buf); |
| 832 | l2cap_pi(sk)->num_conf_req++; |
| 833 | |
| 834 | release_sock(sk); |
| 835 | return 0; |
| 836 | } |
| 837 | |
| 838 | release_sock(sk); |
| 839 | |
| 840 | if (sock->type == SOCK_STREAM) |
| 841 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
| 842 | |
| 843 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
| 844 | } |
| 845 | |
Gustavo F. Padovan | 05fc157 | 2011-02-04 03:26:01 -0200 | [diff] [blame] | 846 | /* Kill socket (only if zapped and orphan) |
| 847 | * Must be called on unlocked socket. |
| 848 | */ |
| 849 | void l2cap_sock_kill(struct sock *sk) |
| 850 | { |
| 851 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 852 | return; |
| 853 | |
| 854 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 855 | |
| 856 | /* Kill poor orphan */ |
| 857 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 858 | sock_set_flag(sk, SOCK_DEAD); |
| 859 | sock_put(sk); |
| 860 | } |
| 861 | |
Gustavo F. Padovan | 6de0702 | 2011-02-04 03:35:20 -0200 | [diff] [blame] | 862 | /* Must be called on unlocked socket. */ |
| 863 | static void l2cap_sock_close(struct sock *sk) |
| 864 | { |
| 865 | l2cap_sock_clear_timer(sk); |
| 866 | lock_sock(sk); |
| 867 | __l2cap_sock_close(sk, ECONNRESET); |
| 868 | release_sock(sk); |
| 869 | l2cap_sock_kill(sk); |
| 870 | } |
| 871 | |
| 872 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 873 | { |
| 874 | struct sock *sk; |
| 875 | |
| 876 | BT_DBG("parent %p", parent); |
| 877 | |
| 878 | /* Close not yet accepted channels */ |
| 879 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 880 | l2cap_sock_close(sk); |
| 881 | |
| 882 | parent->sk_state = BT_CLOSED; |
| 883 | sock_set_flag(parent, SOCK_ZAPPED); |
| 884 | } |
| 885 | |
| 886 | void __l2cap_sock_close(struct sock *sk, int reason) |
| 887 | { |
Ville Tervo | 5589fa9 | 2011-02-10 22:38:51 -0300 | [diff] [blame] | 888 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 889 | |
Gustavo F. Padovan | 6de0702 | 2011-02-04 03:35:20 -0200 | [diff] [blame] | 890 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 891 | |
| 892 | switch (sk->sk_state) { |
| 893 | case BT_LISTEN: |
| 894 | l2cap_sock_cleanup_listen(sk); |
| 895 | break; |
| 896 | |
| 897 | case BT_CONNECTED: |
| 898 | case BT_CONFIG: |
Ville Tervo | 5589fa9 | 2011-02-10 22:38:51 -0300 | [diff] [blame] | 899 | if ((sk->sk_type == SOCK_SEQPACKET || |
| 900 | sk->sk_type == SOCK_STREAM) && |
| 901 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | 6de0702 | 2011-02-04 03:35:20 -0200 | [diff] [blame] | 902 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 903 | l2cap_send_disconn_req(conn, sk, reason); |
| 904 | } else |
| 905 | l2cap_chan_del(sk, reason); |
| 906 | break; |
| 907 | |
| 908 | case BT_CONNECT2: |
Ville Tervo | 5589fa9 | 2011-02-10 22:38:51 -0300 | [diff] [blame] | 909 | if ((sk->sk_type == SOCK_SEQPACKET || |
| 910 | sk->sk_type == SOCK_STREAM) && |
| 911 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | 6de0702 | 2011-02-04 03:35:20 -0200 | [diff] [blame] | 912 | struct l2cap_conn_rsp rsp; |
| 913 | __u16 result; |
| 914 | |
| 915 | if (bt_sk(sk)->defer_setup) |
| 916 | result = L2CAP_CR_SEC_BLOCK; |
| 917 | else |
| 918 | result = L2CAP_CR_BAD_PSM; |
| 919 | |
| 920 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 921 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 922 | rsp.result = cpu_to_le16(result); |
| 923 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 924 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 925 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 926 | } else |
| 927 | l2cap_chan_del(sk, reason); |
| 928 | break; |
| 929 | |
| 930 | case BT_CONNECT: |
| 931 | case BT_DISCONN: |
| 932 | l2cap_chan_del(sk, reason); |
| 933 | break; |
| 934 | |
| 935 | default: |
| 936 | sock_set_flag(sk, SOCK_ZAPPED); |
| 937 | break; |
| 938 | } |
| 939 | } |
| 940 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 941 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 942 | { |
| 943 | struct sock *sk = sock->sk; |
| 944 | int err = 0; |
| 945 | |
| 946 | BT_DBG("sock %p, sk %p", sock, sk); |
| 947 | |
| 948 | if (!sk) |
| 949 | return 0; |
| 950 | |
| 951 | lock_sock(sk); |
| 952 | if (!sk->sk_shutdown) { |
| 953 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 954 | err = __l2cap_wait_ack(sk); |
| 955 | |
| 956 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 957 | l2cap_sock_clear_timer(sk); |
| 958 | __l2cap_sock_close(sk, 0); |
| 959 | |
| 960 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
| 961 | err = bt_sock_wait_state(sk, BT_CLOSED, |
| 962 | sk->sk_lingertime); |
| 963 | } |
| 964 | |
| 965 | if (!err && sk->sk_err) |
| 966 | err = -sk->sk_err; |
| 967 | |
| 968 | release_sock(sk); |
| 969 | return err; |
| 970 | } |
| 971 | |
Gustavo F. Padovan | 554f05b | 2011-02-04 02:36:42 -0200 | [diff] [blame] | 972 | static int l2cap_sock_release(struct socket *sock) |
| 973 | { |
| 974 | struct sock *sk = sock->sk; |
| 975 | int err; |
| 976 | |
| 977 | BT_DBG("sock %p, sk %p", sock, sk); |
| 978 | |
| 979 | if (!sk) |
| 980 | return 0; |
| 981 | |
| 982 | err = l2cap_sock_shutdown(sock, 2); |
| 983 | |
| 984 | sock_orphan(sk); |
| 985 | l2cap_sock_kill(sk); |
| 986 | return err; |
| 987 | } |
| 988 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 989 | static void l2cap_sock_destruct(struct sock *sk) |
| 990 | { |
| 991 | BT_DBG("sk %p", sk); |
| 992 | |
| 993 | skb_queue_purge(&sk->sk_receive_queue); |
| 994 | skb_queue_purge(&sk->sk_write_queue); |
| 995 | } |
| 996 | |
| 997 | void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 998 | { |
| 999 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1000 | |
| 1001 | BT_DBG("sk %p", sk); |
| 1002 | |
| 1003 | if (parent) { |
| 1004 | sk->sk_type = parent->sk_type; |
| 1005 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
| 1006 | |
| 1007 | pi->imtu = l2cap_pi(parent)->imtu; |
| 1008 | pi->omtu = l2cap_pi(parent)->omtu; |
| 1009 | pi->conf_state = l2cap_pi(parent)->conf_state; |
| 1010 | pi->mode = l2cap_pi(parent)->mode; |
| 1011 | pi->fcs = l2cap_pi(parent)->fcs; |
| 1012 | pi->max_tx = l2cap_pi(parent)->max_tx; |
| 1013 | pi->tx_win = l2cap_pi(parent)->tx_win; |
| 1014 | pi->sec_level = l2cap_pi(parent)->sec_level; |
| 1015 | pi->role_switch = l2cap_pi(parent)->role_switch; |
| 1016 | pi->force_reliable = l2cap_pi(parent)->force_reliable; |
| 1017 | pi->flushable = l2cap_pi(parent)->flushable; |
| 1018 | } else { |
| 1019 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 1020 | pi->omtu = 0; |
| 1021 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
| 1022 | pi->mode = L2CAP_MODE_ERTM; |
| 1023 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
| 1024 | } else { |
| 1025 | pi->mode = L2CAP_MODE_BASIC; |
| 1026 | } |
| 1027 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; |
| 1028 | pi->fcs = L2CAP_FCS_CRC16; |
| 1029 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
| 1030 | pi->sec_level = BT_SECURITY_LOW; |
| 1031 | pi->role_switch = 0; |
| 1032 | pi->force_reliable = 0; |
| 1033 | pi->flushable = BT_FLUSHABLE_OFF; |
| 1034 | } |
| 1035 | |
| 1036 | /* Default config options */ |
| 1037 | pi->conf_len = 0; |
| 1038 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 1039 | skb_queue_head_init(TX_QUEUE(sk)); |
| 1040 | skb_queue_head_init(SREJ_QUEUE(sk)); |
| 1041 | skb_queue_head_init(BUSY_QUEUE(sk)); |
| 1042 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
| 1043 | } |
| 1044 | |
| 1045 | static struct proto l2cap_proto = { |
| 1046 | .name = "L2CAP", |
| 1047 | .owner = THIS_MODULE, |
| 1048 | .obj_size = sizeof(struct l2cap_pinfo) |
| 1049 | }; |
| 1050 | |
| 1051 | struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
| 1052 | { |
| 1053 | struct sock *sk; |
| 1054 | |
| 1055 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
| 1056 | if (!sk) |
| 1057 | return NULL; |
| 1058 | |
| 1059 | sock_init_data(sock, sk); |
| 1060 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 1061 | |
| 1062 | sk->sk_destruct = l2cap_sock_destruct; |
| 1063 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
| 1064 | |
| 1065 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 1066 | |
| 1067 | sk->sk_protocol = proto; |
| 1068 | sk->sk_state = BT_OPEN; |
| 1069 | |
| 1070 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
| 1071 | |
| 1072 | bt_sock_link(&l2cap_sk_list, sk); |
| 1073 | return sk; |
| 1074 | } |
| 1075 | |
| 1076 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
| 1077 | int kern) |
| 1078 | { |
| 1079 | struct sock *sk; |
| 1080 | |
| 1081 | BT_DBG("sock %p", sock); |
| 1082 | |
| 1083 | sock->state = SS_UNCONNECTED; |
| 1084 | |
| 1085 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
| 1086 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 1087 | return -ESOCKTNOSUPPORT; |
| 1088 | |
| 1089 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
| 1090 | return -EPERM; |
| 1091 | |
| 1092 | sock->ops = &l2cap_sock_ops; |
| 1093 | |
| 1094 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
| 1095 | if (!sk) |
| 1096 | return -ENOMEM; |
| 1097 | |
| 1098 | l2cap_sock_init(sk, NULL); |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
Gustavo F. Padovan | 6539058 | 2011-02-04 02:33:56 -0200 | [diff] [blame] | 1102 | const struct proto_ops l2cap_sock_ops = { |
| 1103 | .family = PF_BLUETOOTH, |
| 1104 | .owner = THIS_MODULE, |
| 1105 | .release = l2cap_sock_release, |
| 1106 | .bind = l2cap_sock_bind, |
| 1107 | .connect = l2cap_sock_connect, |
| 1108 | .listen = l2cap_sock_listen, |
| 1109 | .accept = l2cap_sock_accept, |
| 1110 | .getname = l2cap_sock_getname, |
| 1111 | .sendmsg = l2cap_sock_sendmsg, |
| 1112 | .recvmsg = l2cap_sock_recvmsg, |
| 1113 | .poll = bt_sock_poll, |
| 1114 | .ioctl = bt_sock_ioctl, |
| 1115 | .mmap = sock_no_mmap, |
| 1116 | .socketpair = sock_no_socketpair, |
| 1117 | .shutdown = l2cap_sock_shutdown, |
| 1118 | .setsockopt = l2cap_sock_setsockopt, |
| 1119 | .getsockopt = l2cap_sock_getsockopt |
| 1120 | }; |
| 1121 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1122 | static const struct net_proto_family l2cap_sock_family_ops = { |
| 1123 | .family = PF_BLUETOOTH, |
| 1124 | .owner = THIS_MODULE, |
| 1125 | .create = l2cap_sock_create, |
| 1126 | }; |
| 1127 | |
| 1128 | int __init l2cap_init_sockets(void) |
| 1129 | { |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1130 | int err; |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1131 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1132 | err = proto_register(&l2cap_proto, 0); |
| 1133 | if (err < 0) |
| 1134 | return err; |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1135 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1136 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 1137 | if (err < 0) |
| 1138 | goto error; |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1139 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1140 | BT_INFO("L2CAP socket layer initialized"); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1141 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1142 | return 0; |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1143 | |
| 1144 | error: |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1145 | BT_ERR("L2CAP socket registration failed"); |
| 1146 | proto_unregister(&l2cap_proto); |
| 1147 | return err; |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | void l2cap_cleanup_sockets(void) |
| 1151 | { |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1152 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 1153 | BT_ERR("L2CAP socket unregistration failed"); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1154 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 1155 | proto_unregister(&l2cap_proto); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 1156 | } |